Millisecond microwave spikes in a solar flare

Details Millisecond microwave spikes in a solar flare Millisecond microwave spikes in a solar flare

Oct 1978

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978natur.275..520s&link_type=abstract

Nature, vol. 275, Oct. 12, 1978, p. 520, 521. Research supported by the Nederlandse Organisatie voor Zuiver-Wetenschappelijk Ond

Computer Science

103

Decimeter Waves, Microwave Emission, Solar Flares, Solar Radio Bursts, Brightness Temperature, Circular Polarization, Solar Flux Density

Scientific paper

Results are reported for observations of two solar microwave outbursts which exhibited a strong and extremely fast fluctuating burst component. Many of the spikes, which were observed during microwave flares, appeared to have half-power durations smaller than the 20-millisecond resolution of the double-sideband receiver used. The polarization of the spikes and continuum is discussed, and a particle-acceleration mechanism effective on a time scale of milliseconds is considered. A lower limit of 10 to the 15th power K is obtained for the brightness temperature. It is concluded that a coherent radiation mechanism is necessary to account for such brightness temperatures.

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